A 750W power supply sits in a sweet spot for most mid-range UK PC builds in 2025. It is enough headroom for an RTX 4070 or RX 7800 XT paired with a modern Ryzen or Intel Core processor, without the unnecessary cost of stepping up to 850W or 1000W. Since last year, ATX 3.1 and PCIe 5.0 connector standards have become far more common even at this price point, meaning you no longer have to pay a premium to future-proof your cable management. The budget ceiling has also dropped noticeably: fully modular 80 Plus Gold units that twelve months ago now regularly appear under £100. This comparison is aimed at builders spending between £50 and £100 on a PSU, whether that is a first-time budget build, a mid-range gaming rig, or a workstation upgrade. We cover six units ranging from a no-frills Bronze-rated option to a Cybenetics Platinum-rated Gold supply, so you can match the right unit to your actual needs and spending limit.
Quick Verdict
Best Overall: NZXT C750 Gold Core. Cybenetics Platinum efficiency rating, ATX 3.1 compliant, fully modular, and available just under £100 makes it the standout pick for anyone who wants the most capable 750W unit without breaking the budget.
Best Value: MSI MAG A750BN. At around £55, it includes a native PCIe 5.0 connector, an 80 Plus Bronze rating that is perfectly adequate for most builds, and a five-year warranty. It is the most money-conscious choice in the lineup.
The MSI MAG A750BN is the best-value pick in this roundup. At around £55, it undercuts most of the competition significantly while still delivering a native PCIe 5.0 connector, a five-year warranty, and an 80 Plus Bronze efficiency rating. For builders on a strict budget who still want modern connector compatibility, it is a compelling option that punches above its price.
The PCIe 5.0 GPU support connector is a genuine highlight at this price. MSI includes a native 12VHPWR connector rather than requiring you to use an adapter, which is the safer approach for high-power GPUs. This means the MAG A750BN is technically compatible with RTX 4090-class cards from a connector standpoint, though the 750W total output would be the limiting factor for the very highest-end GPUs.
The MAG A750BN is a semi-modular unit: the 24-pin ATX motherboard cable and the CPU EPS cables are permanently attached, while the PCIe, SATA, and Molex cables are detachable. This is a reasonable compromise at this price point, as the fixed cables are the ones you will always need, and the modular secondary cables keep clutter manageable.
MSI uses a 120mm hydraulic bearing fan, which offers a good balance of noise and longevity. The unit does not feature a 0dB mode, so the fan runs continuously, but at low loads it is very quiet. Voltage regulation and protection features are adequate for the price, covering the standard suite of OVP, UVP, OCP, OPP, OTP, and SCP.
The 80 Plus Bronze rating means slightly higher heat output compared to Gold units, but for a budget build in a well-ventilated case this is not a practical concern. The five-year warranty is standard for this tier and provides adequate coverage for most build lifespans.
Who is this for? First-time builders, budget gaming rigs, secondary PCs, and anyone who wants a modern PCIe 5.0 connector without spending more than £60. It is the most cost-effective way to get a 750W unit with native 12VHPWR support in the UK.
Verdict: Outstanding value at around £55, with a native PCIe 5.0 connector and semi-modular design that beats most rivals at twice the price on connectivity. The Bronze rating is the only meaningful compromise.
Pros
- Native PCIe 5.0 / 12VHPWR connector included at a price point where many rivals require adapters
- Semi-modular design keeps secondary cable clutter manageable despite the budget price
- Lowest price in the roundup for a semi-modular unit with modern GPU connector support
Cons
- 80 Plus Bronze efficiency generates more heat than Gold-rated alternatives, which can matter in restricted airflow builds
- No 0dB fan mode means the fan runs at all times, adding a small amount of noise at idle
How We Picked
We evaluated each unit against five criteria: efficiency certification and real-world efficiency data where available, modular design and cable management practicality, connector compatibility with current and near-future GPU standards, warranty length, and price-to-specification ratio. Units were assessed against the ATX 3.0 and ATX 3.1 specifications, with particular attention to 12VHPWR and PCIe 5.0 connector inclusion. We cross-referenced manufacturer specifications with independent reviews from Hardware Busters, Cybenetics, and Tom's Hardware where data was available. Price data reflects current UK retail pricing. We excluded units from the catalogue pool that were either significantly over 750W without a strong value case or that lacked sufficient specification data for a fair comparison. All six picks offer at least a five-year warranty and come from manufacturers with established UK distribution and support.
Buying Guide
What wattage do you actually need?
A 750W power supply is not overkill for most mid-range gaming builds. It provides comfortable headroom above the actual system power draw, which matters because PSUs operate most efficiently and run coolest at around 50 percent of their rated capacity. A system drawing 450W under gaming load will run a 750W unit at 60 percent capacity, which is an ideal operating point. Going lower, to a 500W unit, is fine for builds with lower-power GPUs such as an RTX 4060 or RX 7600, but a 750W unit gives you room to upgrade your GPU later without replacing the PSU.
Is 750W enough for an RTX 4080?
Nvidia recommends a 750W PSU for the RTX 4080, so yes, a quality 750W Gold unit such as the NZXT C750 Gold Core or ASUS TUF Gaming 750W Gold will power an RTX 4080 system with a mid-range CPU. However, the headroom is tighter than ideal. If you are pairing an RTX 4080 with a high-end CPU such as an Intel Core i9 or Ryzen 9, stepping up to an 850W unit is a sensible precaution. For an RTX 4090, 750W is not sufficient and you should look at 850W to 1000W units.
80 Plus Gold versus 80 Plus Bronze: does it matter?
The difference in efficiency between Bronze and Gold is approximately 5 to 8 percentage points at typical loads. For a system drawing 400W under gaming load, a Gold unit wastes roughly 44W as heat compared to a Bronze unit's 59W. Over a year of daily gaming, that difference translates to around 55 kWh, which at current UK electricity rates costs approximately £15 to £20 per year. Gold units also run cooler, which can extend component lifespan and reduce fan noise. If you are keeping the PC for several years, the efficiency saving typically offsets the price premium. For a budget build you plan to replace within two or three years, Bronze is a perfectly rational choice.
80 Plus Gold versus 80 Plus Platinum
Platinum-rated units are more efficient still, typically 90 percent or better at 50 percent load compared to Gold's 87 percent. The real-world electricity saving over Gold is smaller than the Gold-over-Bronze saving, and Platinum units typically cost significantly more. At the 750W price point under £100, true Platinum units are rare. The NZXT C750 Gold Core's Cybenetics Platinum rating is notable because it achieves near-Platinum real-world efficiency at a Gold price, making it the exception rather than the rule.
Modular versus non-modular
Fully modular units allow you to remove every cable, including the 24-pin ATX lead, which makes cable routing tidier and airflow better. Semi-modular units fix the essential cables (24-pin, CPU EPS) and make secondary cables detachable. Non-modular units have all cables permanently attached. For most mid-tower builds, fully or semi-modular is strongly preferred. Non-modular units are acceptable in large cases with generous cable management space, or in builds where budget is the overriding concern.
Connector compatibility
If you are buying or planning to buy an RTX 40-series Nvidia GPU, look for a unit with a native 12VHPWR or 12V-2x6 connector. Using multiple 6+2 PCIe adapters into a 16-pin adapter cable is safe but adds clutter and a small theoretical risk at very high power draws. All six picks in this roundup are compatible with current GPU generations, with the Corsair CX750 being the only unit that requires adapter cables for RTX 40-series cards.
Final Verdict
The NZXT C750 Gold Core is the overall winner. It combines a Cybenetics Platinum real-world efficiency rating, full ATX 3.1 compliance, a safer 12V-2x6 GPU connector, a fully modular cable set, and a seven-year warranty into a package priced just under £100. No other unit in this roundup matches that combination of technical specification and long-term value. For builders who cannot stretch to the NZXT, the ASUS TUF Gaming 750W Gold is the next best choice, offering a ten-year warranty and military-grade capacitors at the same price point. For those on a strict budget, the MSI MAG A750BN delivers native PCIe 5.0 connectivity and a semi-modular design at around £55, making it the most cost-effective entry point for a modern 750W build.
